如何在Flutter中将资源上传到FirebaseStorage？

import 'package:firebase_core/firebase_core.dart';
import 'package:firebase_storage/firebase_storage.dart';

void main() async {
  WidgetsFlutterBinding.ensureInitialized();
  await Firebase.initializeApp();
  runApp(MyApp());
}

FirebaseStorage storage = FirebaseStorage.instance;

File file = File('path/to/file');
Reference ref = storage.ref().child('path/to/destination');
UploadTask uploadTask = ref.putFile(file);

uploadTask.snapshotEvents.listen((TaskSnapshot snapshot) {
  print('Upload progress: ${snapshot.bytesTransferred}/${snapshot.totalBytes}');
}, onError: (Object e) {
  print('Upload error: $e');
}, onDone: () {
  print('Upload complete');
});

String downloadURL = await ref.getDownloadURL();
print('Download URL: $downloadURL');